{"id":15082,"date":"2007-02-05T00:00:40","date_gmt":"2007-02-05T06:00:40","guid":{"rendered":"http:\/\/prairieswine.com\/rsc\/?p=15082"},"modified":"2013-08-21T15:41:17","modified_gmt":"2013-08-21T21:41:17","slug":"fertility-after-intrauterine-insemination-with-conventional-or-low-numbers-of-spermatozoa-in-sows-with-synchronized-ovulation","status":"publish","type":"post","link":"https:\/\/prairieswine.com\/rsc\/fertility-after-intrauterine-insemination-with-conventional-or-low-numbers-of-spermatozoa-in-sows-with-synchronized-ovulation\/","title":{"rendered":"Fertility after intrauterine insemination with conventional or low numbers of spermatozoa in sows with synchronized ovulation"},"content":{"rendered":"<p>A total of 411 mixed-parity sows were subjected to controlled ovulation by injection of 600 IU equine chorionic gonadotrophin at weaning and 5 mg porcine luteinizing hormone (pLH) 80 hours later. Sows were assigned to a single insemination of 1 or 3 \u00d7 109 sperm delivered into either the cervix or uterus. Inseminations were performed<br \/>\napproximately 36 hours after pLH injection. Intensity of standing estrus at insemination was subjectively scored as 1<br \/>\nto 3, with 3 being a stronger response, and semen backflow was recorded as yes or no. Number of sperm and site of<br \/>\ndeposition did not affect pregnancy or farrowing rates or subsequent litter size. Mean farrowing rates were 68.32% and 68.63% in sows inseminated using an intrauterine catheter and either 1 or 3 \u00d7 109 sperm, respectively. In sows inseminated using the cervical method, farrowing rates were 77.88% and 67.31% when 1 and 3 \u00d7 109 sperm were used, respectively. Greater intensity of estrus at insemination was associated with higher pregnancy and farrowing<br \/>\nrates (P &lt; .001), and backflow during insemination was associated with lower pregnancy and farrowing rates (P &lt;<br \/>\n.01). When appropriately timed after induced ovulation, insemination of low sperm numbers does not adversely affect sow fertility, and this lack of effect is independent of the site of sperm deposition.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A total of 411 mixed-parity sows were subjected to controlled ovulation by injection of 600 IU equine chorionic gonadotrophin at weaning and 5 mg porcine luteinizing hormone (pLH) 80 hours later. Sows were assigned to a single insemination of 1 or 3 \u00d7 109 sperm delivered into either the cervix or uterus. Inseminations were performed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18120,19],"tags":[103,104,18011],"class_list":["post-15082","post","type-post","status-publish","format-standard","hentry","category-ontario-pork","category-pork-insight-articles","tag-farrowing","tag-sow","tag-tot"],"_links":{"self":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/15082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=15082"}],"version-history":[{"count":1,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/15082\/revisions"}],"predecessor-version":[{"id":15084,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/15082\/revisions\/15084"}],"wp:attachment":[{"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=15082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=15082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=15082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}